Use of sodium chloride in bleaching agents based on percarbonate for human hair application

Abstract

The subject of the present disclosure is a blonding agent for changing the natural color of keratinic fibers, in particular human hair, which contains a) sodium percarbonate, b) sodium chloride and further from 0 to about 8% by weight of water. Furthermore, the present disclosure relates to a method for blonding human hair.

The invention claimed is: 
     
       1. A blonding agent for changing the natural color of keratinic fibers, comprising
 a) sodium percarbonate, 
 b) sodium chloride is present in an amount of from 0.5-0.7% by weight based on the weight of the blonding agent and further 
 c) from 0 to about 8% by weight of water based on the weight of the blonding agent; 
 wherein the blonding agent is in powder form. 
 
     
     
       2. The blonding agent according to  claim 1 , wherein sodium percarbonate is present in an amount of from about 1-50% by weight. 
     
     
       3. The blonding agent according to  claim 1 , further comprises at least one inorganic salt of peroxosulfuric acid and wherein the at least one inorganic salt of a peroxosulfuric acid is selected from sodium peroxodisulfate, potassium peroxodisulfate, ammonium peroxodisulfate, sodium peroxomonosulfate, potassium peroxomonosulfate, ammonium peroxomonosulfate, or mixtures of these compounds. 
     
     
       4. The blonding agent according to  claim 3 , wherein the inorganic salt of a peroxosulfuric acid includes a mixture comprising from about 5 to about 40% by weight of ammonium peroxodisulfate based on the total weight of the blonding agent. 
     
     
       5. The blonding agent according to  claim 1 , further comprising a persulfate, wherein the percarbonate and the persulfate(s) are present separately from one another. 
     
     
       6. The blonding agent according to  claim 5 , wherein the weight ratio of the amount of percarbonate to the total amount of persulfate(s) is between about 2 to about 1 and about 1 to about 20. 
     
     
       7. The blonding agent according to  claim 1 , wherein further comprising at least one inorganic alkalizing agent solid at 20° C. and 1013 mbar, wherein the at least one inorganic alkalizing agent is chosen from sodium silicate or sodium metasilicate having a molar SiO 2 /Na 2 O ratio of ≥2. 
     
     
       8. The blonding agent according to  claim 1 , further comprising at least one complexing agent selected from: ethylenediaminetetraacetic acid (EDTA); N-hydroxyethylethylenediaminetriacetic acid; aminotrimethylenephosphonic acid; diethylenetriaminepentaacetic acid; lauroyl ethylenediamine triacetic acid; nitrilotriacetic acid; iminodisuccinic acid; N-2-hydroxyethyliminodiacetic acid; ethylene glycol-bis-(beta-aminoethyl ether)-N,N-tetraacetic acid; aminotrimethylenephosphonic acid, pentasodium aminotrimethylenephosphonate, and mixtures thereof, in a total amount of from about 0.1-1.4% by weight based on the weight of the blonding agent. 
     
     
       9. The blonding agent according to  claim 1 , wherein sodium percarbonate is present in an amount of from about 4-10% by weight based on the weight of the blonding agent. 
     
     
       10. The blonding agent according to  claim 3 , wherein the at least one inorganic salt of a peroxosulfuric acid is included in the blonding agent in an amount of from about 30-50% by weight based on the weight of the blonding agent. 
     
     
       11. The blonding agent according to  claim 3 , wherein the inorganic salt of a peroxosulfuric acid constitutes a mixture comprising from about 15 to about 30% by weight of potassium peroxodisulfate, from about 10 to about 15% by weight of ammonium peroxodisulfate, and from about 2 to about 20% by weight of sodium peroxodisulfate, in each case based on the total weight of the blonding agent. 
     
     
       12. The blonding agent according to  claim 5 , wherein the weight ratio of the amount of percarbonate to the total amount of persulfate(s) is between about 1 to 3 and about 1 to 6. 
     
     
       13. The blonding agent according to  claim 7 , wherein the at least one inorganic alkalizing agent is present in an amount of from about 5 to about 40% by weight based on the weight of the blonding agent. 
     
     
       14. The blonding agent according to  claim 8 , wherein the at least one complexing agent is present in a total amount of from about 0.5-1.4% by weight based on the weight of the blonding agent. 
     
     
       15. A method for lightening keratinic fibers, wherein a blonding agent according to  claim 1  is mixed with water, applied immediately afterwards to the keratin-containing fibers, left on the fibers for from about 5 to about 60 minutes and then the fibers are rinsed with water and optionally washed with a surfactant-containing detergent. 
     
     
       16. The blonding agent according to  claim 1 , free from hydrogen peroxide.